Field Assessment of Buzz Away Extreme HOMS formulation To Repel Mosquitoes
University of Guelph, Dept. of Environmental Biology, Guelph, Ontario, Canada
Buzz Away Extreme HOMS formula Spray Insect Repellent was tested outdoors against three mosquito species. It provided 99.3% protection after one hour, 91.6% protection at two hours and 89.2% protection at 3 hours. The performance is similar to that of low concentration DEET-based products.
The purpose of this study was to assess, under field conditions, the efficacy of Buzz Away Extreme HOMS formula Insect Repellent (pump spray) to protect humans for up to 4 hours post-application against various mosquito species in southern Ontario.
MATERIALS AND METHODS
Subjects dressed in identical green overalls, head nets and white cotton gloves. The eight subjects were randomly assigned to one of eight positions on a grid located within the study site. All grid positions were at least 10 m from each other. Biting counts were initiated just prior to dusk (20:30 h) to correspond with peak mosquito biting activity and consisted of 8 3.5-minute biting counts. During each biting count subjects aspirated all mosquitoes landing and probing on two exposed forearms. Mosquitoes were aspirated into 150 ml clear plastic vials and following the biting count, subjects recorded the number of mosquitoes captured. Subjects rotated to the next position on the grid within 17 seconds when the next 3.5-minute biting count began. In this manner, each subject was at each grid position once each night and the duration of exposure was at least 30 minutes.
Ambient air temperature and wind speed within the study site were measured at the start and end of the biting counts each evening. Biting counts were not conducted on evenings when air temperature was below 11 degrees Celsius or when strong winds (z 25 kph) or rain occurred because these conditions limit mosquito host-seeking activity.
The mean number of mosquitoes biting treated and non-treated subjects over the eight-evening study was compared using analysis of variance and a Scheffe's comparison of means. The analyses was completed using Statistical Analysis Systems version 6.12 (SAS Institute Inc., Cary, NC).
The results are summarized in Table 1. Buzz Away Extreme HOMS formula Insect Repellent provided a mean protection of 99.3 for a duration of one hour. Subjects treated with the product, at all duration times tested, had significantly fewer mosquitoes landing and biting than non-treated control subjects (P> 0.05).
Buzz Away Extreme HOMS formula Spray Insect Repellent a provided 99.3% protection after one hour, 91.6% protection at two hours and 89.2% protection at 3 hours. The performance is similar to that of low concentration DEET-based products.